Get group address when hover an element via Javascript

[Mirco]

It doesn't work like I want  

Code:

$(".tooltip").mouseover(function(){
    var addr = $(".tooltip").data('object');
    var id = Scada.encodeGroupAddress(addr);
    var obj = objectStore.getObject(id);
});

this is my code, but if I have more visu element with Class "tooltip", this code give me the first group name of the first element that I hover

Someone can help me?